Diff renders improperly for a symlink -> file conversion
Summary
When rendering a diff which includes a symlink which is now a real file, a symlink deletion is shown for both sides.
Steps to reproduce
Upload an MR turning a symlink into a real file.
Expected behavior
The addition hunk should show the new file content.
Actual behaviour
The addition hunk renders as a deletion hunk.
Relevant logs and/or screenshots
GitLab Community Edition 8.11.2 e618ce28
Output of checks
I do not have access to these, but can ask if they are necessary.